Combined oceanic electric field sensor

Abstract

The invention discloses a combined oceanic electric field sensor and a matching test method thereof. The oceanic electric field sensor comprises a data acquisition station (1) for acquiring and storing electric field signals, a data transmission device (2) for transmitting electric field signals detected by electrodes (16 and 26) to the data acquisition station (1), electrode cabins (3 and 4) for installing a watertight connecting socket (5) and fixing the electrodes (16 and 26), the watertight connecting socket (5) for connection of the electrodes (16 and 26), and the electrodes (16 and 26) for detecting the electric field signals. The self noise of the combined oceanic electric field sensor is reduced, the measuring sensitivity of the electric field sensor is improved, repeated usage of the electrodes is achieved, and the using cost of the combined oceanic electric field sensor is reduced.

Description

technical field [0001] The invention belongs to the field of geophysical measurement, in particular to the field of ocean survey, and in particular to a combined ocean electric field sensor. Background technique [0002] The rapid development and application of marine electromagnetic technology stems from the development of detection instruments and sensor components, one of the key sensor components is the high-sensitivity electric field sensor. A prominent problem with electric field measurements in marine environments is that the signal is too weak. Affected by the low-resistance layer of seawater, the electromagnetic field signal attenuates rapidly with the increase of water depth. Compared with land measurement, electric field detection on the seabed needs to increase the detection sensitivity by 1-2 orders of magnitude. Theoretically, increasing the distance between the electric field sensors can improve the detection capability of the submarine electric field, but in...

AI Technical Summary

Problems solved by technology

First of all, the consistency of large-scale electrodes is difficult to guarantee, resulting in low yield; at the same time, typical silver-silver chloride electrodes need to use a large amount of precious metal materials, and if there is a problem during use, they need to be replaced as a whole, and the cost of use is high.

Therefore, how to reduce the cost of use while reducing the self-noise of marine electric field sensors is a difficult problem

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